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Volume 1, Number 1, July, 1922Anonymous Forward . . . . . . . . . . . . . . . . 1--3 W. Wilson A New Type of High Power Vacuum Tube . . 4--17 George A. Campbell Direct Capacity Measurement . . . . . . 18--38 H. M. Trueblood The Relation of the Petersen System of Grounding Power Networks to Inductive Effects in Neighboring Communication Circuits . . . . . . . . . . . . . . . . 39--59 James J. Pilliod Philadelphia--Pittsburgh Section of the New York--Chicago Cable . . . . . . . . 60--87 John R. Carson and J. J. Gilbert Transmission Characteristics of the Submarine Cable . . . . . . . . . . . . 88--115 I. B. Crandall and D. MacKenzie Analysis of the Energy Distribution in Speech . . . . . . . . . . . . . . . . . 116--128 Harvey Fletcher The Nature of Speech and Its Interpretation . . . . . . . . . . . . . 129--144 Anonymous Contributors to This Issue . . . . . . . 145--146
George A. Campbell Physical Theory of the Electric Wave-Filter . . . . . . . . . . . . . . 1--32 R. V. L. Hartley and Thornton C. Fry The Binaural Location of Complex Sounds 33--42 John R. Carson The Heaviside Operational Calculus . . . 43--55 R. L. Wegel The Physical Characteristics of Audition and Dynamical Analysis of the External Ear . . . . . . . . . . . . . . . . . . 56--68 Edward C. Molina The Theory of Probabilities Applied to Telephone Trunking Problems . . . . . . 69--81 W. C. Helmle The Relation Between Rents and Incomes, and the Distribution of Rental Values 82--109 E. T. Hoch Power Losses in Insulating Materials . . 110--116 Lloyd Espenschied Application to Radio of Wire Transmission Engineering . . . . . . . . 117--141 J. B. Johnson A Low Voltage Cathode Ray Oscillograph 142--151 Anonymous Contributors to this Issue . . . . . . . 152--153
Otto J. Zobel Theory and Design of Uniform and Composite Electric Wave-filters . . . . 1--46 J. N. Kirk Specializing Transportation Equipment in Order to Adapt it Most Economically to Telephone Construction and Maintenance Work . . . . . . . . . . . . . . . . . . 47--66 A. B. Clark Telephone Transmission Over Long Cable Circuits . . . . . . . . . . . . . . . . 67--94 George A. Campbell Probability Curves Showing Poisson's Exponential Summation . . . . . . . . . 95--113 J. N. Kirk Bell System Sleet Storm Map . . . . . . 114--121 J. E. Harris and E. E. Schumacher Measurements on the Gases Evolved from Glasses of Known Chemical Composition 122--132 Anonymous Contributors to this Issue . . . . . . . 133
Ray S. Hoyt Impedance of Smooth Lines, and Design of Simulating Networks . . . . . . . . . . 1--40 Arthur F. Rose Practical Application of Carrier Telephone and Telegraph in the Bell System . . . . . . . . . . . . . . . . . 41--52 E. B. Craft and L. F. Morehouse and H. P. Charlesworth Machine Switching Telephone System for Large Metropolitan Areas . . . . . . . . 53--89 R. V. L. Hartley Relations of Carrier and Side-Bands in Radio Transmission . . . . . . . . . . . 90--112 I. W. Green and J. P. Maxfield Public Address Systems . . . . . . . . . 113--142 W. H. Martin and A. B. Clark Use of Public Address System with Telephone Lines . . . . . . . . . . . . 143--161 Anonymous The Contributors to this issue . . . . . 162--163
John R. Carson and Otto J. Zobel Transient Oscillations in Electric Wave-filters . . . . . . . . . . . . . . 1--52 J. N. Kirk Use of Labor-saving Apparatus in Outside Plant Construction Work . . . . . . . . 53--76 Helene C. Bateman A Method of Graphical Analysis . . . . . 77--100 H. D. Arnold and G. W. Elmen Permalloy, A New Magnetic Material of Very High Permeability . . . . . . . . . 101--111 Charles S. Demarest Telephone Equipment for Long Cable Circuits . . . . . . . . . . . . . . . . 112--140 H. W. Nichols and Lloyd Espenschied Radio Extension of the Telephone System to Ships at Sea . . . . . . . . . . . . 141--185 Anonymous The Contributors to this Issue . . . . . 186--187
George A. Campbell Mutual Impedances of Grounded Circuits 1--30 Robert W. King Thermionic Vacuum Tubes and Their Applications . . . . . . . . . . . . . . 31--100 K. K. Darrow Some Contemporary Advances in Physics 101--115 H. D. Arnold and Lloyd Espenschied Transatlantic Radio Telephony . . . . . 116--144 Harvey Fletcher Physical Measurements of Audition and Their Bearing on the Theory of Hearing 145--180 Anonymous Contributors to this Issue . . . . . . . 181--182
S. P. Shackleton and H. W. Purcell Relays in the Bell System . . . . . . . 1--42 W. A. Shewhart Some Applications of Statistical Methods to the Analysis of Physical and Engineering Data . . . . . . . . . . . . 43--87 E. C. Molina and R. P. Crowell Deviation of Random Samples from Average Conditions and Significance to Traffic Men . . . . . . . . . . . . . . . . . . 88--99 Francis F. Lucas Photomicrography and Technical Microscopy in Its Application to Telephone Apparatus . . . . . . . . . . 100--144 J. G. Ferguson A Clock-Controlled Tuning Fork as a Source of Constant Frequency . . . . . . 145--157 Karl K. Darrow Some Contemporary Advances in Physics-II 158--178 Anonymous Contributors to this issue . . . . . . . 179--180
H. T. Friis and A. G. Jensen High Frequency Amplifiers . . . . . . . 181--205 D. D. Miller Design Characteristics of Electromagnets for Telephone Relays . . . . . . . . . . 206--231 I. B. Crandall and C. F. Sacia A Dynamical Study of the Vowel Sounds 232--237 E. B. Wheeler Humidity Recorders . . . . . . . . . . . 238--258 Ronald M. Foster A Reactance Theorem . . . . . . . . . . 259--267 Karl K. Darrow Some Contemporary Advances in Physics --- III . . . . . . . . . . . . . . . . 268--298 R. L. Wegel and C. R. Moore An Electrical Frequency Analyzer . . . . 299--323 H. Nyquist Certain Factors Affecting Telegraph Speed . . . . . . . . . . . . . . . . . 324--346 Anonymous Abstracts of Bell System Technical Papers Not Appearing in the Bell System Technical Journal . . . . . . . . . . . 347--350 Anonymous Contributors to this Issue . . . . . . . 351--352
W. H. Harden Electrical Tests and Their Applications in the Maintenance of Telephone Transmission . . . . . . . . . . . . . . 353--392 John R. Carson A Generalization of the Reciprocal Theorem . . . . . . . . . . . . . . . . 393--399 W. H. Martin The Transmission Unit and Telephone Transmission Reference Systems . . . . . 400--408 C. W. Smith Practical Application of the Recently Adopted Transmission Unit . . . . . . . 409--413 Ray S. Hoyt Impedance of Loaded Lines, and Design of Simulating and Compensating Networks . . 414--467 Karl K. Darrow Some Contemporary Advances in Physics-IV 468--494 H. H. Nance Some Very Long Telephone Circuits of the Bell System . . . . . . . . . . . . . . 495--507 J. W. Horton Vacuum Tube Oscillators --- a Graphical Method of Analysis . . . . . . . . . . . 508--524 Anonymous Abstracts of Technical Papers . . . . . 525--528 Anonymous Contributors To This Issue . . . . . . . 529--530
H. A. Frederick and H. F. Dodge `The Stethophone,' An Electrical Stethoscope . . . . . . . . . . . . . . 531--549 George A. Campbell Mathematics in Industrial Research . . . 550--557 John R. Carson The Building-up of Sinusoidal Currents in Long Periodically Loaded Lines . . . 558--566 Otto J. Zobel Transmission Characteristics of Electric Wave-Filters . . . . . . . . . . . . . . 567--620 Karl K. Darrow Some Contemporary Advances in Physics --- V Electricity in Solids . . . . . . 621--650 Ronald M. Foster Theorems Regarding the Driving-Point Impedance of Two-Mesh Circuits . . . . . 651--685 Anonymous Contributors to this Issue . . . . . . . 686--687
F. L. Rhodes Engineering Cost Studies . . . . . . . . 1--14 George Crisson The Limitation of the Gain of Two-Way Telephone Repeaters by Impedance Irregularities . . . . . . . . . . . . . 15--25 W. H. Harden Practises in Telephone Transmission Maintenance Work . . . . . . . . . . . . 26--51 K. S. Johnson and T. E. Shea Mutual Inductance in Wave Filters with an Introduction on Filter Design . . . . 52--111 Karl K. Darrow Some Contemporary Advances in Physics --- VI Electricity in Gases . . . . . . 112--151 W. V. Wolfe Carrier Telephony on High Voltage Power Lines . . . . . . . . . . . . . . . . . 152--177 Anonymous Abstracts of Bell System Technical Papers Not Appearing in the Bell System Technical Journal . . . . . . . . . . . 178--183 Anonymous Contributors to this Issue . . . . . . . 184--185
H. E. Ives and J. W. Horton and R. D. Parker and A. B. Clark The Transmission of Pictures over Telephone Lines . . . . . . . . . . . . 187--214 H. W. Nichols and J. C. Schelleng Propagation of Electric Waves over the Earth . . . . . . . . . . . . . . . . . 215--234 T. C. Smith Open Tank Creosoting Plants for Treating Chestnut Poles . . . . . . . . . . . . . 235--264 John R. Carson Selective Circuits and Static Interference . . . . . . . . . . . . . . 265--279 Karl K. Darrow Some Contemporary Advances in Physics --- VII Waves and Quanta . . . . . . . . 280--326 Sallie Pero Mead Wave Propagation Over Parallel Tubular Conductors: The Alternating Current Resistance . . . . . . . . . . . . . . . 327--338 Anonymous Abstracts of Bell System Technical Papers Not Appearing in this Journal . . 339--346 Anonymous Contributors to this Issue . . . . . . . 347--348
F. Gill Oliver Heaviside . . . . . . . . . . . . 349--354 Oliver E. Buckley The Loaded Submarine Telegraph Cable . . 355--374 Harvey Fletcher Useful Numerical Constants of Speech and Hearing . . . . . . . . . . . . . . . . 375--386 Charles W. Carter, Jr. Graphic Representation of the Impedance of Networks Containing Resistances and Two Reactances . . . . . . . . . . . . . 387--401 A. S. Curtis The Vibratory Characteristics and Impedance of Telephone Receivers At Low Power Inputs . . . . . . . . . . . . . . 402--406 Karl K. Darrow Some Contemporary Advances in Physics --- VIII The Atom-Model, First Part . . 407--458 Lloyd Espenschied and C. N. Anderson and Austin Bailey Transatlantic Radio Telephone Transmission . . . . . . . . . . . . . . 459--507 Anonymous Abstracts of Bell System Technical Papers Not Appearing in this Journal . . 508--511 Anonymous Contributors to this Issue . . . . . . . 512--513
H. P. Charlesworth General Engineering Problems of the Bell System . . . . . . . . . . . . . . . . . 515--541 G. A. Pennock Engineering Planning for Manufacture . . 542--560 George Crisson Irregularities in Loaded Telephone Circuits . . . . . . . . . . . . . . . . 561--585 Irving B. Crandall The Sounds of Speech . . . . . . . . . . 586--626 C. F. Sacia Speech Power and Energy . . . . . . . . 627--641 Karl K. Darrow Some Contemporary Advances in Physics IX The Atom-Model, Second Part . . . . . . 642--684 John R. Carson Electric Circuit Theory and the Operational Calculus . . . . . . . . . . 685--761 Anonymous Abstracts of Bell System Technical Papers Not Appearing in this Journal . . 762--765 Anonymous Contributors to this Issue . . . . . . . 766--767
Bancroft Gherardi and Robert W. King Joseph Henry, The American Pioneer in Electrical Communication . . . . . . . . 1--10 W. A. Shewhart Correction of Data for Errors of Measurement . . . . . . . . . . . . . . 11--26 Harvey Fletcher The Theory of the Operation of the Howling Telephone with Experimental Confirmation . . . . . . . . . . . . . . 27--49 John R. Carson Electric Circuit Theory and the Operational Calculus Chapter VI, Propagation of Current and Voltage Along the Non-Inductive Cable . . . . . . . . 50--95 Karl K. Darrow Some Contemporary Advances in Physics-X, The Atom-Model, Third Part, A Very Brief Recapitulation of What Has Gone Before 96--142 Ralph Bown and DeLoss K. Martin and Ralph K. Potter Some Studies in Radio Broadcast Transmission . . . . . . . . . . . . . . 143--213 Anonymous Abstracts of Bell System Technical Papers Not Appearing in this Journal . . 214--218 Anonymous Contributors in this Issue . . . . . . . 219--220
Thomas Shaw and William Fondiller Development and Application of Loading for Telephone Circuits . . . . . . . . . 221--281 H. T. Friis A Static Recorder . . . . . . . . . . . 282--291 Ronald M. Foster Directive Diagrams of Antenna Arrays . . 292--307 W. A. Shewhart Correction of Data for Errors of Averages Obtained from Small Samples . . 308--319 Herbert E. Ives The Alkali Metal Photoelectric Cell . . 320--335 John R. Carson Electric Circuit Theory and the Operational Calculus Chapter IX, The Finite Line with Terminal Impedances . . 336--384 Anonymous Abstracts of Recent Technical Papers from Bell System Sources . . . . . . . . 385--389 Anonymous Contributors to this Issue . . . . . . . 390--391
C. F. Sacia and C. J. Beck The Power of Fundamental Speech Sounds 393--403 J. J. Gilbert Extraneous Interference on Submarine Telegraph Cables . . . . . . . . . . . . 404--417 R. B. Shanck Neutralization of Telegraph Crossfire 418--432 F. B. Llewellyn Operation of Thermionic Vacuum Tube Circuits . . . . . . . . . . . . . . . . 433--462 Karl K. Darrow Contemporary Advances in Physics --- XI --- Ionization . . . . . . . . . . . . . 463--492 J. P. Maxfield and H. C. Harrison Methods of High Quality Recording and Reproducing of Music and Speech Based on Telephone Research . . . . . . . . . . . 493--523 Anonymous Abstracts of Recent Technical Papers from Bell System Sources . . . . . . . . 524--525 Anonymous Contributors to this Issue . . . . . . . 526--527
S. E. Anderson Radio Signaling System for the New York Police Department . . . . . . . . . . . 529--538 John R. Carson Wave Propagation in Overhead Wires with Ground Return . . . . . . . . . . . . . 539--554 E. T. Hoch Electrode Effects in the Measurement of Power Factor and Dielectric Constant of Sheet Insulating Materials . . . . . . . 555--572c F. C. Willis and L. E. Melhuish Load Carrying Capacity of Amplifiers . . 573--592 W. A. Shewhart Quality Control Charts . . . . . . . . . 593--603 Frances Thorndike Applications of Poisson's Probability Summation . . . . . . . . . . . . . . . 604--624 S. D. Wilburn Line Current Regulation in Bridge Polar Duplex Telegraph Circuits . . . . . . . 625--635 H. W. Hitchcock Carrier-Current Communication on Submarine Cables . . . . . . . . . . . . 636--651 Anonymous Abstracts of Recent Technical Books And Papers From Bell System Sources . . . . 652--659 Anonymous Contributors to this Issue . . . . . . . 660--661
John R. Carson Electromagnetic Theory and the Foundations of Electric Circuit Theory 1--17 J. Davidson Toll Switchboard No. 3 . . . . . . . . . 18--26 P. G. Edwards and H. W. Herrington The Location of Opens in Toll Telephone Cables . . . . . . . . . . . . . . . . . 27--54 Karl K. Darrow Contemporary Advances in Physics --- XII Radioactivity . . . . . . . . . . . . . 55--99 Irving B. Crandall Dynamical Study of the Vowel Sounds, Part II . . . . . . . . . . . . . . . . 100--116 Lloyd Espenschied Radio Broadcast Coverage of City Areas 117--141 W. J. Shackelton A Shielded Bridge for Inductive Impedance Measurements at Speech and Carrier Frequencies . . . . . . . . . . 142--171 Anonymous Letters to the Editor . . . . . . . . . 172--180 Anonymous Abstracts of Recent Technical Papers from Bell System Sources . . . . . . . . 181--183 Anonymous Contributors to this Issue . . . . . . . 184--185
John R. Shea and Samuel McMullan Developments in the Manufacture of Copper Wire . . . . . . . . . . . . . . 187--216 C. R. Moore and A. S. Curtis An Analyzer for the Voice Frequency Range . . . . . . . . . . . . . . . . . 217--229 A. G. Landeen Analyzer for Complex Electric Waves . . 230--247 Ralph Brown Transatlantic Radio Telephony . . . . . 248--257 W. P. Mason A Study of the Regular Combination of Acoustic Elements, with Applications to Recurrent Acoustic Filters, Tapered Acoustic Fibers, And Horns . . . . . . . 258--294 Karl K. Darrow Contemporary Advances in Physics-XIII. Ferromagnetism . . . . . . . . . . . . . 295--366 Anonymous Abstracts of Bell System Technical Papers Not Appearing in this Journal . . 367--371 Anonymous Contributors to this Issue . . . . . . . 372--373
J. G. Ferguson Measurement of Inductance by the Shielded Owen Bridge . . . . . . . . . . 375--386 J. J. Gilbert Determination of Electrical Characteristics of Loaded Telegraph Cables . . . . . . . . . . . . . . . . . 387--401 A. A. Clokey Automatic Printing Equipment for Long Loaded Submarine Telegraph Cables . . . 402--424 Austen M. Curtis The Application of Vacuum Tube Amplifiers to Submarine Telegraph Cables 425--441 Eugene Peterson and Herbert P. Evans Modulation in Vacuum Tubes Used As Amplifiers . . . . . . . . . . . . . . . 442--460 Edward C. Molina Application of the Theory of Probability To Telephone Trunking Problems . . . . . 461--494 John R. Carson and Ray S. Hoyt Propagation of Periodic Currents Over a System Of Parallel Wires . . . . . . . . 495--545 Anonymous Abstracts of Bell System Technical Papers Not Appearing in this Journal . . 546--548 Anonymous Contributors to this Issue . . . . . . . 549--550
Herbert E. Ives Television . . . . . . . . . . . . . . . 551--559 Frank Gray and J. W. Horton and R. C. Mathes The Production on Utilization of Television Signals . . . . . . . . . . . 560--604 H. M. Stoller and E. R. Morton Synchronization of Television . . . . . 604--615 D. K. Gannett and E. I. Green Wire Transmission System for Television 616--632 Edward L. Nelson Radio Transmission System for Television 633--652 Karl K. Darrow Contemporary Advances in Physics. XIV Introduction to Wave Mechanics . . . . . 653--701 R. L. Young Power Plants for Telephone Offices . . . 702--721 W. A. Shewhart Quality Control . . . . . . . . . . . . 722--735 S. B. Wright and H. C. Silent The New York--London Telephone Circuit 736--749 Anonymous Abstracts of Bell System Technical Papers Not Appearing in this Journal . . 750--751 Anonymous Contributors to this Issue . . . . . . . 752--754
E. C. Wente and E. H. Bedell The Measurement of Acoustic Impedance and the Absorption Coefficient of Porous Materials . . . . . . . . . . . . . . . 1--10 John R. Carson The Rigorous and Approximate Theories of Electrical Transmission Along Wires . . 11--25 Paul P. Coggins Some General Results of Elementary Sampling Theory for Engineering Use . . 26--69 W. J. Shackelton and J. G. Ferguson Electrical Measurement of Communication Apparatus . . . . . . . . . . . . . . . 70--89 C. J. Davisson The Diffraction of Electrons by a Crystal of Nickel . . . . . . . . . . . 90--105 Eugene Peterson and Clyde R. Keith Grid Current Modulation . . . . . . . . 106--139 E. C. Wente and A. L. Thuras A High Efficiency Receiver for a Horn-Type Loud Speaker of Large Power Capacity . . . . . . . . . . . . . . . . 140--153 Anonymous Abstracts of Bell System Technical Papers Not Appearing in this Journal . . 154--158 Anonymous Contributors to this Issue . . . . . . . 159--160
Anonymous Joint Meeting of the Institution of Electrical Engineers and the American Institute of Electrical Engineers . . . 161--167 O. B. Blackwell Transatlantic Telephony --- the Technical Problem . . . . . . . . . . . 168--186 K. W. Waterson Transatlantic Telephony --- Service and Operating Features . . . . . . . . . . . 187--194 Sallie Pero Mead Phase Distortion and Phase Distortion Correction . . . . . . . . . . . . . . . 195--224 Oliver E. Buckley High-Speed Ocean Cable Telegraphy . . . 225--267 John R. Carson The Present Status of Wire Transmission Theory and Some of its Outstanding Problems . . . . . . . . . . . . . . . . 268--280 Karl K. Darrow Contemporary Advances in Physics --- XV The Classical Theory of Light, First Part . . . . . . . . . . . . . . . . . . 281--320 C. D. Hart Recent Developments in the Process of Manufacturing Lead-Covered Telephone Cable . . . . . . . . . . . . . . . . . 321--342 J. Herman Bridge for Measuring Small Time Intervals . . . . . . . . . . . . . . . 343--349 H. F. Dodge A Method of Rating Manufactured Product 350--368 Anonymous Abstracts of Bell System Technical Papers Not Appearing in this Journal . . 369--372 Anonymous Contributors to this Issue . . . . . . . 373--374
J. H. Kasley and F. P. Hutchison Precision Tool Making for the Manufacture of Telephone Apparatus . . . 375--403 C. R. Englund The Natural Period of Linear Conductors 404--419 J. G. Ferguson and B. W. Bartlett The Measurement of Capacitance in Terms of Resistance and Frequency . . . . . . 420--437 Otto J. Zobel Distortion Correction in Electrical Circuits with Constant Resistance Recurrent Networks . . . . . . . . . . . 438--534 R. V. L. Hartley Transmission of Information . . . . . . 535--563 H. A. Affel and C. S. Demarest and C. W. Green Carrier Systems on Long Distance Telephone Lines . . . . . . . . . . . . 564--629 Anonymous Abstracts of Bell System Technical Papers Not Appearing in this Journal . . 630--635 Anonymous Contributors to this Issue . . . . . . . 636--637
George A. Campbell The Practical Application of the Fourier Integral . . . . . . . . . . . . . . . . 639--707 C. W. Robbins Automatic Machine Gaging . . . . . . . . 708--729 Karl K. Darrow Contemporary Advances in Physics, XVI The Classical Theory of Light, Second Part . . . . . . . . . . . . . . . . . . 730--761 Eugene Peterson Harmonic Production in Ferromagnetic Materials at Low Frequencies and Low Flux Densities . . . . . . . . . . . . . 762--796 Edward B. Craft Airways Communication Service . . . . . 797--807 Anonymous Abstracts of Bell System Technical Papers Not Appearing in this Journal . . 808--813 Anonymous Contributors to this Issue . . . . . . . 814
W. H. Martin Decibel--The Name for the Transmission Unit . . . . . . . . . . . . . . . . . . 1--2 H. S. Osborne The Principles of Electric Circuits Applied to Communication . . . . . . . . 3--20 G. W. Elmen Magnetic Properties of Perminvar . . . . 21--40 H. O. Siegmund The Aluminum Electrolytic Condenser . . 41--63 Karl K. Darrow Contemporary Advances in Physics, XVII, The Scattering of Light with Change of Frequency . . . . . . . . . . . . . . . 64--93 John R. Carson Ground Return Impedance: Underground Wire with Earth Return . . . . . . . . . 94--98 E. C. Molina Application to the Binomial Summation of a Laplacian Method for the Evaluation of Definite Integrals . . . . . . . . . . . 99--108 W. P. Mason A New Method for Obtaining Transient Solutions of Electrical Networks . . . . 109--134 L. G. Bostwick Acoustic Considerations Involved in Steady State Loud Speaker Measurements 135--158 Halsey A. Frederick Recent Advances in Wax Recording . . . . 159--172 Donald MacKenzie Sound Recording with the Light Valve . . 173--183 H. M. Stoller Synchronization and Speed Control of Synchronized Sound Pictures . . . . . . 184--195 E. O. Scriven A Sound Projector System for Use in Motion Picture Theaters . . . . . . . . 196--208 Anonymous Abstracts of Bell System Technical Papers Not Appearing in this Journal . . 209--213 Anonymous Contributors to this Issue . . . . . . . 214--216
C. J. Davisson Electrons and Quanta . . . . . . . . . . 217--224 R. R. Williams and E. J. Murphy The Predominating Influence of Moisture and Electrolytic Material Upon Textiles as Insulators . . . . . . . . . . . . . 225--242 H. H. Glenn and E. B. Wood Purified Textile Insulation for Telephone Central Office Wiring . . . . 243--256 J. R. Townsend Telephone Apparatus Springs: A Review of the Principal Types and the Properties Desired of These Springs . . . . . . . . 257--266 J. Herman Effect of Signal Distortion on Morse Telegraph Transmission Quality . . . . . 267--285 J. B. Johnson A Braun Tube Hysteresigraph . . . . . . 286--308 Austin Bailey and S. W. Dean and W. T. Wintringham The Receiving System for Long-Wave Transatlantic Radio Telephony . . . . . 309--367 W. A. Marrison Oscillographs for Recording Transient Phenomena . . . . . . . . . . . . . . . 368--390 Karl K. Darrow Contemporary Advances in Physics, XVIII, The Diffraction of Waves by Crystals . . 391--428 Anonymous Abstracts of Technical Articles From Bell System Sources . . . . . . . . . . 429--432 Anonymous Contributions to this Issue . . . . . . 433--434
G. W. Elmen Magnetic Alloys of Iron, Nickel, and Cobalt . . . . . . . . . . . . . . . . . 435--465 C. J. Davisson and L. H. Germer A Test for Polarization of Electron Waves by Reflection . . . . . . . . . . 466--481 W. O. Pennell A Generalization of Heaviside's Expansion Theorem . . . . . . . . . . . 482--492 W. A. Marrison A High Precision Standard of Frequency 493--514 F. R. Lack Observations on Modes of Vibration and Temperature Coefficients of Quartz Crystal Plates . . . . . . . . . . . . . 515--535 W. H. Martin and C. H. G. Gray Master Reference System for Telephone Transmission . . . . . . . . . . . . . . 536--559 J. G. Ferguson Shielding in High-Frequency Measurements 560--575 John R. Townsend and Charles H. Greenall Fatigue Studies of Non-Ferrous Sheet Metals . . . . . . . . . . . . . . . . . 576--590 L. H. Germer An Application of Electron Diffraction to the Study of Gas Adsorption . . . . . 591--604 Anonymous Abstracts of Technical Articles From Bell System Sources . . . . . . . . . . 605--610 Anonymous Contributions to this Issue . . . . . . 611--612
H. F. Dodge and H. G. Romig A Method of Sampling Inspection . . . . 613--631 E. C. Molina and R. I. Wilkinson The Frequency Distribution of the Unknown Mean of a Sampled Universe . . . 632--645 L. J. Sivian Speech Power and Its Measurement . . . . 646--661 W. Howard Wise Asymptotic Dipole Radiation Formulas . . 662--671 Karl K. Darrow Statistical Theories of Matter, Radiation and Electricity . . . . . . . 672--748 J. R. Townsend and W. A. Straw Physical Properties and Methods of Test For Some Sheet Non-Ferrous Metals . . . 749--805 H. Fletcher and J. C. Steinberg Articulation Testing Methods . . . . . . 806--854 Anonymous Abstracts of Technical Articles from Bell System Sources . . . . . . . . . . 855--859 Anonymous Contributors to this Issue . . . . . . . 860--861